Errors encountered while processing 22-dual-stack-rfc8950.yml
IncorrectValue in interfaces: Invalid unnumbered IPv4 interface vio1 (dut -> x1) on node dut 
... Device openbsd (node dut) does not support unnumbered IPv4 interfaces
IncorrectValue in interfaces: Invalid unnumbered IPv4 interface vio2 (dut -> x2) on node dut 
Fatal error in netlab: Cannot proceed beyond this point due to errors, exiting